Version 5.0 The LEDA User Manual

double p.ydist(const d3 point& q)
returns the y-distance between p and q.
double p.zdist(const d3 point& q)
returns the z-distance between p and q.
double p.distance(const d3 point& q)
returns the Euclidean distance between p and q.
d3 point
p.translate(double dx, double dy, double dz)
returns p translated by vector (dx, dy, dz).
d3 point p.translate(const vector& v)
returns p+v, i.e., p translated by vector v.
Precondition: v.dim() = 3.
d3 point p + const vector& v returns p translated by vector v.
d3 point p − const vector& v returns p translated by vector −v.
d3 point p.reflect(const d3 point& q, const d3 point& r, const d3 point& s)
d3 point p.reflect(const d3 point& q)
returns p reflected across the plane passing through q, r
and s.
returns p reflected across point q.
vector
ostream&
istream&
p − const d3 point& q
ostream& O ≪ const d3 point& p
istream& I ≫ d3 point& p
returns the difference vector of the coordinates.
writes p to output stream O.
reads the coordinates of p (three double numbers) from
input stream I.
Non-Member Functions
int cmp distances(const d3 point& p1 , const d3 point& p2 , const d3 point& p3 ,
const d3 point& p4 )
compares the distances (p1 , p2 ) and (p3 , p4 ). Returns
+1 (−1) if distance (p1 , p2 ) is larger (smaller) than distance
(p3 , p4 ), otherwise 0.
d3 point center(const d3 point& a, const d3 point& b)
returns the center of a and b, i.e. a + ⃗ ab/2.